public class CouplingExample {

    public static void main(String[] args)
    {
        UserDataProvider userDataProvider =new MongoDBProvide();

        UserManager userManager=new UserManager(userDataProvider);
        System.out.println(userManager.getUserInfo());



        UserDataProvider WSProvider =new WebServiceProvider();

        userManager =new UserManager(WSProvider);
        System.out.println(userManager.getUserInfo());



    }
}
